How many grams of neon gas should be placed into a 10.0 l container in order for it to meet stp conditions?
12.2 g
9.00 g
0.00441g
122 g

by cartels in other countries, shipped by air, mail, or land. i cant really see your answer choices : /

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol